Integrated Circuits
Data Sheet
ET7272B
QUAD DIFFERENTIAL LINE DRIVER SEPARATE LOGIC BIAS AND DRIVER BIAS, WITH TRI-STATE OUTPUTS
FEATURES
- Supply (Bias) Voltage Range 3.5V to 30V
- Operation to 800KHz
- CMOS and TTL Compatible Inputs
- Separate logic bias and driver supply pins
- Optional single supply operation for moderate power applications
- High Impedance Buffered Inputs with hysteresis
- Tri-State outputs
- 80mA peak SINK/SOURCE current
This part is available in 16L SOIC or 20L TSSOP (all Pb-free) packages, or as die.
PACKAGE SUFFIX (Pb-free)
Die Only -C -----------
16 Lead SOIC -SOP -SOP-LF
20 Lead TSSOP -TSS -TSS-LF
| Package |
Suffix |
(Pb-free) |
| Die Only |
-C |
----------- |
| 16 Lead SOIC |
-SOP |
-SOP-LF |
| 20 Lead TSSOP |
-TSS |
-TSS-LF |
APPLICATIONS:
- Encoders
- Industrial controls
DESCRIPTION
These line drivers are pin compatible with 26LS31 in applications where pin 4 = 5V and pin 12 = GND. Internal clamp diodes allow trouble-free operation when driving cable lengths exceeding 100m. Split supplies are provided to minimize standby power dissipation in high voltage applications. The logic should be powered from a regulated 5V supply at the VccBias pin. The output stages may then be powered by a separate supply at VccDrivers, up to 30V. Output voltage swings of 0.3V to VCC-1.9V are typical. The outputs are protected against shorts to ground, shorts to Vcc and to other outputs, by a two-fold scheme of current limiting and thermal shutdown. This assures highly reliable operation in harsh environments.
The outputs may be placed into a high impedance state by application of a logic high at the EN- pin. For normal operation, this pin should be at logic low or grounded.
ELECTRICAL CHARACTERISTICS
Unless otherwise specified, TA = 25°C and EN- <0.8V.
Parameters |
Symbol |
Min. |
Typ. |
Max. |
Units |
Test Conditions |
| Overtemp Release Point (junction) |
TJOP |
- |
172 |
- |
°C |
Note 1 |
Overtemp Release Point (junction) |
TJRP |
- |
136 |
- |
°C |
Note 1 |
Vcc Bias Voltage Range |
Vccb |
3.5 |
5 |
30 |
V |
- |
Vcc Drivers Voltage Range |
Vccd |
4.5 |
5 |
30 |
V |
- |
Supply Current Vccb1 (Bias) |
Iccb1 |
- |
11.9 |
16.0 |
mA |
Vccb and Vccd = 5V |
Supply Current Vccd1 (Drivers) |
Iccd1 |
- |
2.4 |
3.3 |
mA |
Vccb and Vccd = 5V |
Supply Current Vccb2 |
Iccb2 |
- |
2.5 |
3.4 |
mA |
Vccb and Vccd = 5V, EN- > 2V |
Supply Current Vccd2 |
Iccd2 |
- |
0.0 |
0.1 |
mA |
Vccb and Vccd = 5V, EN- > 2V |
Supply Current Vccb3 |
Iccb3 |
- |
12.1 |
18.5 |
mA |
Vccb and Vccd = 30V |
Supply Current Vccd3 |
Iccb4 |
- |
2.4 |
3.3 |
mA |
Vccb and Vccd = 30V |
Supply Current Vccb4 |
Iccb4 |
- |
2.6 |
3.5 |
mA |
Vccb and Vccd = 5V, EN- > 2V |
Supply Current Vccd4 |
Iccd4 |
- |
0.0 |
0.1 |
mA |
Vccb and Vccd = 5V, EN- > 2V |
Enable Input Threshold |
VTHE |
0.8 |
1.5 |
2 |
V |
- |
Enable Low Level Input Current |
IILE |
-10 |
0 |
10 |
µA |
Vin = 0V, Vccb = 5V |
Enable High Level Input Current |
IIHE |
- |
108 |
150 |
µA |
Vin = 5V, Vccb = 5V |
High Impedance Output Leakage |
IOZ |
-4.0 |
0.0 |
4.0 |
µA |
Vccd =30V, EN- > 2V, Output at 15V |
Input Positive-Going Threshold |
Vt+ |
1.05 |
1.25 |
1.45 |
V |
Vccb = 5V |
Input Negative-Going Threshold |
VT- |
0.75 |
0.95 |
1.15 |
V |
Vccb = 5V |
Input Hysteresis |
VH |
- |
0.3 |
- |
V |
Vccb = 5V |
Low Level Input Current |
IIL |
- |
-0.1 |
-4.0 |
µA |
Vin = 0V, Vccb = 5V |
High Level Input Current |
IIH |
- |
0 |
4.0 |
µA |
Vin = 5V, Vccb = 5V |
| Low Level Output1 |
VOL1 |
- |
375 |
500 |
mV |
IOL = 20mA, Vccd = 5V |
Low Level Output2 |
VOL2 |
- |
370 |
500 |
mV |
IOL = 20mA, Vccd =30V |
High Level Output1 |
VOH1 |
2.4 |
2.8 |
- |
V |
IOH = -20mA, Vccd = 5V |
High Level Output2 |
VOH2 |
27.7 |
28.1 |
- |
V |
IOH = -20mA, Vccd=30V |
NOTES:
- This is not a test parameter, but for information only.
ABSOLUTE MAXIMUM RATING
| Parameter |
Symbol |
Min. |
Max. |
Units |
Ref. |
| Operating Temperature Range |
TA |
-55 |
115 |
°C |
Note 1. |
| Supply (Driver) Voltage Range |
VCCD |
4.5 |
30 |
V |
- |
AC SWITCHING CHARACTERISTICS
Values given at VCCB = 5V, VCCd = 24V, TA = 25°C, CL = 1000pF on all outputs, and EN- <0.8V.
Parameters |
Symbol |
Min. |
Typ. |
Max. |
Units |
Test Conditions |
Propagation delay, rising input 50% point to zero crossing of differential outputs
|
TPLH |
- |
450 |
630 |
ns |
See above. |
Propagation delay, falling input 50% point to zero crossing of differential outputs
|
TPHL |
- |
450 |
630 |
ns |
See above. |
Output Rise Time |
TR |
- |
700 |
980 |
ns |
See above. |
Output Fall Time |
TF |
- |
700 |
980 |
ns |
See above. |
ET7272B-C
Size = 2261µ x 3150µ (.089” x .124”)
Thickness = 305µ (.012”)
(pad coordinates below in microns)
|
